Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1 | /* Copied from tbf.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <bts.h> |
| 23 | #include <tbf.h> |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 24 | #include <tbf_dl.h> |
| 25 | #include <tbf_ul.h> |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 26 | #include <rlc.h> |
| 27 | #include <gprs_rlcmac.h> |
| 28 | #include <gprs_debug.h> |
| 29 | #include <gprs_bssgp_pcu.h> |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 30 | #include <gprs_codel.h> |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 31 | #include <decoding.h> |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 32 | #include <encoding.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 33 | #include <gprs_ms.h> |
| 34 | #include <gprs_ms_storage.h> |
| 35 | #include <llc.h> |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 36 | #include "pcu_utils.h" |
| 37 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 38 | extern "C" { |
| 39 | #include <osmocom/core/msgb.h> |
| 40 | #include <osmocom/core/talloc.h> |
Alexander Couzens | 95e3792 | 2016-05-21 22:33:27 +0200 | [diff] [blame] | 41 | #include <osmocom/gprs/gprs_bssgp_bss.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 42 | #include <osmocom/core/bitvec.h> |
| 43 | #include <osmocom/core/linuxlist.h> |
| 44 | #include <osmocom/core/logging.h> |
| 45 | #include <osmocom/core/rate_ctr.h> |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 46 | #include <osmocom/core/stats.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 47 | #include <osmocom/core/timer.h> |
| 48 | #include <osmocom/core/utils.h> |
| 49 | #include <osmocom/gsm/gsm_utils.h> |
| 50 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 51 | #include "coding_scheme.h" |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | #include <errno.h> |
| 55 | #include <string.h> |
| 56 | |
| 57 | /* After sending these frames, we poll for ack/nack. */ |
| 58 | #define POLL_ACK_AFTER_FRAMES 20 |
| 59 | |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 60 | extern void *tall_pcu_ctx; |
| 61 | |
| 62 | static const struct rate_ctr_desc tbf_dl_gprs_ctr_description[] = { |
| 63 | { "gprs:downlink:cs1", "CS1 " }, |
| 64 | { "gprs:downlink:cs2", "CS2 " }, |
| 65 | { "gprs:downlink:cs3", "CS3 " }, |
| 66 | { "gprs:downlink:cs4", "CS4 " }, |
| 67 | }; |
| 68 | |
| 69 | static const struct rate_ctr_desc tbf_dl_egprs_ctr_description[] = { |
| 70 | { "egprs:downlink:mcs1", "MCS1 " }, |
| 71 | { "egprs:downlink:mcs2", "MCS2 " }, |
| 72 | { "egprs:downlink:mcs3", "MCS3 " }, |
| 73 | { "egprs:downlink:mcs4", "MCS4 " }, |
| 74 | { "egprs:downlink:mcs5", "MCS5 " }, |
| 75 | { "egprs:downlink:mcs6", "MCS6 " }, |
| 76 | { "egprs:downlink:mcs7", "MCS7 " }, |
| 77 | { "egprs:downlink:mcs8", "MCS8 " }, |
| 78 | { "egprs:downlink:mcs9", "MCS9 " }, |
| 79 | }; |
| 80 | |
| 81 | static const struct rate_ctr_group_desc tbf_dl_gprs_ctrg_desc = { |
| 82 | "tbf:gprs", |
| 83 | "Data Blocks", |
| 84 | OSMO_STATS_CLASS_SUBSCRIBER, |
| 85 | ARRAY_SIZE(tbf_dl_gprs_ctr_description), |
| 86 | tbf_dl_gprs_ctr_description, |
| 87 | }; |
| 88 | |
| 89 | static const struct rate_ctr_group_desc tbf_dl_egprs_ctrg_desc = { |
| 90 | "tbf:egprs", |
| 91 | "Data Blocks", |
| 92 | OSMO_STATS_CLASS_SUBSCRIBER, |
| 93 | ARRAY_SIZE(tbf_dl_egprs_ctr_description), |
| 94 | tbf_dl_egprs_ctr_description, |
| 95 | }; |
| 96 | |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 97 | static void llc_timer_cb(void *_tbf) |
| 98 | { |
| 99 | struct gprs_rlcmac_dl_tbf *tbf = (struct gprs_rlcmac_dl_tbf *)_tbf; |
| 100 | |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 101 | if (tbf->state_is_not(TBF_ST_FLOW)) |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 102 | return; |
| 103 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 104 | LOGPTBFDL(tbf, LOGL_DEBUG, "LLC receive timeout, requesting DL ACK\n"); |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 105 | |
| 106 | tbf->request_dl_ack(); |
| 107 | } |
| 108 | |
Pau Espin Pedrol | 834cbab | 2020-10-23 22:17:01 +0200 | [diff] [blame] | 109 | gprs_rlcmac_dl_tbf::BandWidth::BandWidth() : |
| 110 | dl_bw_octets(0), |
| 111 | dl_throughput(0), |
| 112 | dl_loss_lost(0), |
| 113 | dl_loss_received(0) |
| 114 | { |
| 115 | timespecclear(&dl_bw_tv); |
| 116 | timespecclear(&dl_loss_tv); |
| 117 | } |
| 118 | |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 119 | static int dl_tbf_dtor(struct gprs_rlcmac_dl_tbf *tbf) |
| 120 | { |
| 121 | tbf->~gprs_rlcmac_dl_tbf(); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | struct gprs_rlcmac_dl_tbf *tbf_alloc_dl_tbf(struct gprs_rlcmac_bts *bts, GprsMs *ms, int8_t use_trx, bool single_slot) |
| 126 | { |
| 127 | struct gprs_rlcmac_dl_tbf *tbf; |
| 128 | int rc; |
| 129 | |
| 130 | OSMO_ASSERT(ms != NULL); |
| 131 | |
Pau Espin Pedrol | 36177c6 | 2021-02-25 17:57:37 +0100 | [diff] [blame] | 132 | LOGPMS(ms, DTBF, LOGL_DEBUG, "********** DL-TBF starts here **********\n"); |
| 133 | LOGPMS(ms, DTBF, LOGL_INFO, "Allocating DL TBF\n"); |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 134 | |
| 135 | tbf = talloc(tall_pcu_ctx, struct gprs_rlcmac_dl_tbf); |
| 136 | |
| 137 | if (!tbf) |
| 138 | return NULL; |
| 139 | |
| 140 | talloc_set_destructor(tbf, dl_tbf_dtor); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 141 | new (tbf) gprs_rlcmac_dl_tbf(bts, ms); |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 142 | |
| 143 | rc = tbf->setup(use_trx, single_slot); |
| 144 | /* if no resource */ |
| 145 | if (rc < 0) { |
| 146 | talloc_free(tbf); |
| 147 | return NULL; |
| 148 | } |
| 149 | |
| 150 | if (tbf->is_egprs_enabled()) { |
| 151 | tbf->set_window_size(); |
| 152 | tbf->m_dl_egprs_ctrs = rate_ctr_group_alloc(tbf, |
| 153 | &tbf_dl_egprs_ctrg_desc, |
| 154 | tbf->m_ctrs->idx); |
| 155 | if (!tbf->m_dl_egprs_ctrs) { |
| 156 | LOGPTBF(tbf, LOGL_ERROR, "Couldn't allocate EGPRS DL counters\n"); |
| 157 | talloc_free(tbf); |
| 158 | return NULL; |
| 159 | } |
| 160 | } else { |
| 161 | tbf->m_dl_gprs_ctrs = rate_ctr_group_alloc(tbf, |
| 162 | &tbf_dl_gprs_ctrg_desc, |
| 163 | tbf->m_ctrs->idx); |
| 164 | if (!tbf->m_dl_gprs_ctrs) { |
| 165 | LOGPTBF(tbf, LOGL_ERROR, "Couldn't allocate GPRS DL counters\n"); |
| 166 | talloc_free(tbf); |
| 167 | return NULL; |
| 168 | } |
| 169 | } |
| 170 | |
Pau Espin Pedrol | 1a1557a | 2021-05-13 18:39:36 +0200 | [diff] [blame] | 171 | llist_add(tbf_trx_list((struct gprs_rlcmac_tbf *)tbf), &tbf->trx->dl_tbfs); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 172 | bts_do_rate_ctr_inc(tbf->bts, CTR_TBF_DL_ALLOCATED); |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 173 | |
Pau Espin Pedrol | b385969 | 2020-10-23 22:37:52 +0200 | [diff] [blame] | 174 | osmo_clock_gettime(CLOCK_MONOTONIC, &tbf->m_bw.dl_bw_tv); |
| 175 | osmo_clock_gettime(CLOCK_MONOTONIC, &tbf->m_bw.dl_loss_tv); |
| 176 | |
| 177 | return tbf; |
| 178 | } |
| 179 | |
Pau Espin Pedrol | 62e06f9 | 2021-07-26 17:27:51 +0200 | [diff] [blame^] | 180 | gprs_rlcmac_dl_tbf::~gprs_rlcmac_dl_tbf() |
| 181 | { |
| 182 | osmo_timer_del(&m_llc_timer); |
| 183 | /* ~gprs_rlcmac_dl_tbf() is called automatically upon return */ |
| 184 | } |
| 185 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 186 | gprs_rlcmac_dl_tbf::gprs_rlcmac_dl_tbf(struct gprs_rlcmac_bts *bts_, GprsMs *ms) : |
Pau Espin Pedrol | e9f77d3 | 2020-10-23 18:41:40 +0200 | [diff] [blame] | 187 | gprs_rlcmac_tbf(bts_, ms, GPRS_RLCMAC_DL_TBF), |
Pau Espin Pedrol | bddf1ad | 2019-09-26 14:41:18 +0200 | [diff] [blame] | 188 | m_tx_counter(0), |
| 189 | m_wait_confirm(0), |
| 190 | m_dl_ack_requested(false), |
Pau Espin Pedrol | a89008b | 2021-03-02 13:07:05 +0100 | [diff] [blame] | 191 | m_last_dl_poll_fn(-1), |
| 192 | m_last_dl_drained_fn(-1), |
Pau Espin Pedrol | bddf1ad | 2019-09-26 14:41:18 +0200 | [diff] [blame] | 193 | m_dl_gprs_ctrs(NULL), |
| 194 | m_dl_egprs_ctrs(NULL) |
| 195 | { |
| 196 | memset(&m_llc_timer, 0, sizeof(m_llc_timer)); |
Pau Espin Pedrol | ad586a9 | 2019-09-26 14:42:41 +0200 | [diff] [blame] | 197 | osmo_timer_setup(&m_llc_timer, llc_timer_cb, this); |
Pau Espin Pedrol | bddf1ad | 2019-09-26 14:41:18 +0200 | [diff] [blame] | 198 | } |
| 199 | |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 200 | void gprs_rlcmac_dl_tbf::start_llc_timer() |
| 201 | { |
Pau Espin Pedrol | f473ec9 | 2021-01-14 14:45:14 +0100 | [diff] [blame] | 202 | if (the_pcu->vty.llc_idle_ack_csec > 0) { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 203 | struct timespec tv; |
Pau Espin Pedrol | f473ec9 | 2021-01-14 14:45:14 +0100 | [diff] [blame] | 204 | csecs_to_timespec(the_pcu->vty.llc_idle_ack_csec, &tv); |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 205 | osmo_timer_schedule(&m_llc_timer, tv.tv_sec, tv.tv_nsec / 1000); |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 206 | } |
| 207 | } |
| 208 | |
Pau Espin Pedrol | 758ace8 | 2020-10-28 19:58:17 +0100 | [diff] [blame] | 209 | int gprs_rlcmac_dl_tbf::append_data(uint16_t pdu_delay_csec, |
| 210 | const uint8_t *data, uint16_t len) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 211 | { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 212 | struct timespec expire_time; |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 213 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 214 | LOGPTBFDL(this, LOGL_DEBUG, "appending %u bytes\n", len); |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 215 | |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 216 | struct msgb *llc_msg = msgb_alloc(len, "llc_pdu_queue"); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 217 | if (!llc_msg) |
| 218 | return -ENOMEM; |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 219 | |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 220 | gprs_llc_queue::calc_pdu_lifetime(bts, pdu_delay_csec, &expire_time); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 221 | memcpy(msgb_put(llc_msg, len), data, len); |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 222 | llc_queue()->enqueue(llc_msg, &expire_time); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 223 | start_llc_timer(); |
| 224 | |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 225 | if (state_is(TBF_ST_WAIT_RELEASE)) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 226 | LOGPTBFDL(this, LOGL_DEBUG, "in WAIT RELEASE state (T3193), so reuse TBF\n"); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 227 | establish_dl_tbf_on_pacch(); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 233 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, GprsMs *ms, |
| 234 | struct gprs_rlcmac_dl_tbf **tbf) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 235 | { |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 236 | bool ss; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 237 | int8_t use_trx; |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 238 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL, *old_ul_tbf; |
Jacob Erlbeck | 90de3a7 | 2015-04-09 19:18:59 +0200 | [diff] [blame] | 239 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Pau Espin Pedrol | 322456e | 2020-05-08 18:15:59 +0200 | [diff] [blame] | 240 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 241 | ul_tbf = ms_ul_tbf(ms); |
Pau Espin Pedrol | 322456e | 2020-05-08 18:15:59 +0200 | [diff] [blame] | 242 | |
Pau Espin Pedrol | 4b6f0bf | 2021-05-10 18:54:52 +0200 | [diff] [blame] | 243 | /* 3GPP TS 44.060 sec 7.1.3.1 Initiation of the Packet resource request procedure: |
| 244 | * "Furthermore, the mobile station shall not respond to PACKET DOWNLINK ASSIGNMENT |
| 245 | * or MULTIPLE TBF DOWNLINK ASSIGNMENT messages before contention resolution is |
| 246 | * completed on the mobile station side." */ |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 247 | if (ul_tbf && ul_tbf->m_contention_resolution_done |
| 248 | && !ul_tbf->m_final_ack_sent) { |
| 249 | use_trx = ul_tbf->trx->trx_no; |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 250 | ss = false; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 251 | old_ul_tbf = ul_tbf; |
| 252 | } else { |
| 253 | use_trx = -1; |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 254 | ss = true; /* PCH assignment only allows one timeslot */ |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 255 | old_ul_tbf = NULL; |
| 256 | } |
| 257 | |
| 258 | // Create new TBF (any TRX) |
Max | 5a6bcfb | 2017-09-01 14:36:44 +0200 | [diff] [blame] | 259 | /* FIXME: Copy and paste with alloc_ul_tbf */ |
Jacob Erlbeck | 5879c64 | 2015-07-10 10:41:36 +0200 | [diff] [blame] | 260 | /* set number of downlink slots according to multislot class */ |
Pau Espin Pedrol | 322456e | 2020-05-08 18:15:59 +0200 | [diff] [blame] | 261 | dl_tbf = tbf_alloc_dl_tbf(bts, ms, use_trx, ss); |
Jacob Erlbeck | 90de3a7 | 2015-04-09 19:18:59 +0200 | [diff] [blame] | 262 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 263 | if (!dl_tbf) { |
Pau Espin Pedrol | 36177c6 | 2021-02-25 17:57:37 +0100 | [diff] [blame] | 264 | LOGPMS(ms, DTBF, LOGL_NOTICE, "No PDCH resource\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 265 | return -EBUSY; |
| 266 | } |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 267 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 268 | LOGPTBFDL(dl_tbf, LOGL_DEBUG, "[DOWNLINK] START\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 269 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 270 | /* trigger downlink assignment and set state to ASSIGN. |
| 271 | * we don't use old_downlink, so the possible uplink is used |
| 272 | * to trigger downlink assignment. if there is no uplink, |
| 273 | * AGCH is used. */ |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 274 | dl_tbf->trigger_ass(old_ul_tbf); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 275 | *tbf = dl_tbf; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * TODO: split into unit test-able parts... |
| 281 | */ |
Pau Espin Pedrol | 8a35e64 | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 282 | int dl_tbf_handle(struct gprs_rlcmac_bts *bts, |
| 283 | const uint32_t tlli, const uint32_t tlli_old, const char *imsi, |
| 284 | uint8_t ms_class, uint8_t egprs_ms_class, |
| 285 | const uint16_t delay_csec, |
| 286 | const uint8_t *data, const uint16_t len) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 287 | { |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 288 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 289 | int rc; |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 290 | GprsMs *ms, *ms_old; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 291 | |
| 292 | /* check for existing TBF */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 293 | ms = bts_ms_store(bts)->get_ms(tlli, tlli_old, imsi); |
Jacob Erlbeck | a47aaa4 | 2016-01-07 16:47:34 +0100 | [diff] [blame] | 294 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 295 | if (ms && strlen(ms_imsi(ms)) == 0) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 296 | ms_old = bts_ms_store(bts)->get_ms(0, 0, imsi); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 297 | if (ms_old && ms_old != ms) { |
| 298 | /* The TLLI has changed (RAU), so there are two MS |
| 299 | * objects for the same MS */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 300 | LOGP(DTBF, LOGL_NOTICE, |
| 301 | "There is a new MS object for the same MS: (0x%08x, '%s') -> (0x%08x, '%s')\n", |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 302 | ms_tlli(ms_old), ms_imsi(ms_old), ms_tlli(ms), ms_imsi(ms)); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 303 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 304 | ms_ref(ms_old); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 305 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 306 | if (!ms_dl_tbf(ms) && ms_dl_tbf(ms_old)) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 307 | LOGP(DTBF, LOGL_NOTICE, |
| 308 | "IMSI %s, old TBF %s: moving DL TBF to new MS object\n", |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 309 | imsi, ms_dl_tbf(ms_old)->name()); |
| 310 | dl_tbf = ms_dl_tbf(ms_old); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 311 | /* Move the DL TBF to the new MS */ |
| 312 | dl_tbf->set_ms(ms); |
| 313 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 314 | ms_merge_and_clear_ms(ms, ms_old); |
| 315 | |
| 316 | ms_unref(ms_old); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 317 | } |
| 318 | } |
| 319 | |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 320 | if (!ms) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 321 | ms = bts_alloc_ms(bts, ms_class, egprs_ms_class); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 322 | ms_set_imsi(ms, imsi); |
| 323 | ms_confirm_tlli(ms, tlli); |
| 324 | if (!ms_ms_class(ms) && ms_class) { |
| 325 | ms_set_ms_class(ms, ms_class); |
Pau Espin Pedrol | 758ace8 | 2020-10-28 19:58:17 +0100 | [diff] [blame] | 326 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 327 | if (!ms_egprs_ms_class(ms) && egprs_ms_class) { |
| 328 | ms_set_egprs_ms_class(ms, egprs_ms_class); |
Pau Espin Pedrol | 758ace8 | 2020-10-28 19:58:17 +0100 | [diff] [blame] | 329 | } |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 330 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 331 | dl_tbf = ms_dl_tbf(ms); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 332 | if (!dl_tbf) { |
Pau Espin Pedrol | 528820d | 2020-10-26 12:40:11 +0100 | [diff] [blame] | 333 | rc = tbf_new_dl_assignment(bts, ms, &dl_tbf); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 334 | if (rc < 0) |
| 335 | return rc; |
| 336 | } |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 337 | |
Pau Espin Pedrol | 758ace8 | 2020-10-28 19:58:17 +0100 | [diff] [blame] | 338 | rc = dl_tbf->append_data(delay_csec, data, len); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 339 | |
| 340 | return rc; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | struct msgb *gprs_rlcmac_dl_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
| 344 | { |
| 345 | struct msgb *msg; |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 346 | struct timespec tv_now, tv_now2; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 347 | uint32_t octets = 0, frames = 0; |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 348 | struct timespec hyst_delta = {0, 0}; |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 349 | const unsigned keep_small_thresh = 60; |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 350 | const MetaInfo *info; |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 351 | |
Pau Espin Pedrol | f473ec9 | 2021-01-14 14:45:14 +0100 | [diff] [blame] | 352 | if (the_pcu->vty.llc_discard_csec) |
| 353 | csecs_to_timespec(the_pcu->vty.llc_discard_csec, &hyst_delta); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 354 | |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 355 | osmo_clock_gettime(CLOCK_MONOTONIC, &tv_now); |
| 356 | timespecadd(&tv_now, &hyst_delta, &tv_now2); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 357 | |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 358 | while ((msg = llc_queue()->dequeue(&info))) { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 359 | const struct timespec *tv_disc = &info->expire_time; |
| 360 | const struct timespec *tv_recv = &info->recv_time; |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 361 | |
| 362 | gprs_bssgp_update_queue_delay(tv_recv, &tv_now); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 363 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 364 | if (ms() && ms_codel_state(ms())) { |
| 365 | int bytes = llc_queue_octets(llc_queue()); |
| 366 | if (gprs_codel_control(ms_codel_state(ms()), |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 367 | tv_recv, &tv_now, bytes)) |
| 368 | goto drop_frame; |
| 369 | } |
| 370 | |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 371 | /* Is the age below the low water mark? */ |
Jacob Erlbeck | 6dbe822 | 2015-05-29 10:37:09 +0200 | [diff] [blame] | 372 | if (!gprs_llc_queue::is_frame_expired(&tv_now2, tv_disc)) |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 373 | break; |
| 374 | |
| 375 | /* Is the age below the high water mark */ |
Jacob Erlbeck | 6dbe822 | 2015-05-29 10:37:09 +0200 | [diff] [blame] | 376 | if (!gprs_llc_queue::is_frame_expired(&tv_now, tv_disc)) { |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 377 | /* Has the previous message not been dropped? */ |
| 378 | if (frames == 0) |
| 379 | break; |
| 380 | |
| 381 | /* Hysteresis mode, try to discard LLC messages until |
| 382 | * the low water mark has been reached */ |
| 383 | |
| 384 | /* Check whether to abort the hysteresis mode */ |
| 385 | |
| 386 | /* Is the frame small, perhaps only a TCP ACK? */ |
| 387 | if (msg->len <= keep_small_thresh) |
| 388 | break; |
| 389 | |
| 390 | /* Is it a GMM message? */ |
| 391 | if (!gprs_llc::is_user_data_frame(msg->data, msg->len)) |
| 392 | break; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 393 | } |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 394 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 395 | bts_do_rate_ctr_inc(bts, CTR_LLC_FRAME_TIMEDOUT); |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 396 | drop_frame: |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 397 | frames++; |
| 398 | octets += msg->len; |
| 399 | msgb_free(msg); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 400 | bts_do_rate_ctr_inc(bts, CTR_LLC_FRAME_DROPPED); |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 401 | continue; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | if (frames) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 405 | LOGPTBFDL(this, LOGL_NOTICE, "Discarding LLC PDU " |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 406 | "because lifetime limit reached, " |
| 407 | "count=%u new_queue_size=%zu\n", |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 408 | frames, llc_queue_size(llc_queue())); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 409 | if (frames > 0xff) |
| 410 | frames = 0xff; |
| 411 | if (octets > 0xffffff) |
| 412 | octets = 0xffffff; |
Jacob Erlbeck | 6e013a1 | 2015-08-21 15:10:23 +0200 | [diff] [blame] | 413 | if (bctx) |
| 414 | bssgp_tx_llc_discarded(bctx, tlli(), frames, octets); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 415 | } |
| 416 | |
| 417 | return msg; |
| 418 | } |
| 419 | |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 420 | bool gprs_rlcmac_dl_tbf::restart_bsn_cycle() |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 421 | { |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 422 | /* If V(S) == V(A) and finished state, we would have received |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 423 | * acknowledgement of all transmitted block. In this case we would |
| 424 | * have transmitted the final block, and received ack from MS. But in |
| 425 | * this case we did not receive the final ack indication from MS. This |
| 426 | * should never happen if MS works correctly. |
| 427 | */ |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 428 | if (m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 429 | LOGPTBFDL(this, LOGL_DEBUG, "MS acked all blocks\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 430 | return false; |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | /* cycle through all unacked blocks */ |
| 434 | int resend = m_window.mark_for_resend(); |
| 435 | |
| 436 | /* At this point there should be at least one unacked block |
| 437 | * to be resent. If not, this is an software error. */ |
| 438 | if (resend == 0) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 439 | LOGPTBFDL(this, LOGL_ERROR, |
| 440 | "FIXME: Software error: There are no unacknowledged blocks, but V(A) != V(S). PLEASE FIX!\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 441 | return false; |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 442 | } |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 443 | |
| 444 | return true; |
| 445 | } |
| 446 | |
| 447 | int gprs_rlcmac_dl_tbf::take_next_bsn(uint32_t fn, |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 448 | int previous_bsn, enum mcs_kind req_mcs_kind, bool *may_combine) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 449 | { |
| 450 | int bsn; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 451 | int data_len2, force_data_len = -1; |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 452 | enum CodingScheme tx_cs; |
| 453 | |
| 454 | /* Scheduler may be fine with sending any kind of data, but if |
| 455 | the selected TBF is GPRS-only, then let's filter out EGPRS |
| 456 | here */ |
| 457 | if (!is_egprs_enabled()) |
| 458 | req_mcs_kind = GPRS; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 459 | |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 460 | /* search for a nacked or resend marked bsn */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 461 | bsn = m_window.resend_needed(); |
| 462 | |
| 463 | if (previous_bsn >= 0) { |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 464 | tx_cs = m_rlc.block(previous_bsn)->cs_current_trans; |
| 465 | if (!mcs_is_edge(tx_cs)) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 466 | return -1; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 467 | force_data_len = m_rlc.block(previous_bsn)->len; |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 468 | } else { |
| 469 | tx_cs = ms_current_cs_dl(ms(), req_mcs_kind); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | if (bsn >= 0) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 473 | /* resend an unacked bsn or resend bsn. */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 474 | if (previous_bsn == bsn) |
| 475 | return -1; |
| 476 | |
| 477 | if (previous_bsn >= 0 && |
| 478 | m_window.mod_sns(bsn - previous_bsn) > RLC_EGPRS_MAX_BSN_DELTA) |
| 479 | return -1; |
| 480 | |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 481 | if (is_egprs_enabled()) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 482 | /* Table 8.1.1.2 and Table 8.1.1.1 of 44.060 */ |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 483 | m_rlc.block(bsn)->cs_current_trans = get_retx_mcs(m_rlc.block(bsn)->cs_init, tx_cs, |
Pau Espin Pedrol | 97296b2 | 2021-01-14 13:08:02 +0100 | [diff] [blame] | 484 | bts->pcu->vty.dl_arq_type == EGPRS_ARQ1); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 485 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 486 | LOGPTBFDL(this, LOGL_DEBUG, |
Max | a035354 | 2019-03-06 18:03:58 +0100 | [diff] [blame] | 487 | "initial_cs_dl(%s) last_mcs(%s) demanded_mcs(%s) cs_trans(%s) arq_type(%d) bsn(%d)\n", |
| 488 | mcs_name(m_rlc.block(bsn)->cs_init), |
| 489 | mcs_name(m_rlc.block(bsn)->cs_last), |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 490 | mcs_name(tx_cs), |
Max | a035354 | 2019-03-06 18:03:58 +0100 | [diff] [blame] | 491 | mcs_name(m_rlc.block(bsn)->cs_current_trans), |
Pau Espin Pedrol | 97296b2 | 2021-01-14 13:08:02 +0100 | [diff] [blame] | 492 | the_pcu->vty.dl_arq_type, bsn); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 493 | |
| 494 | /* TODO: Need to remove this check when MCS-8 -> MCS-6 |
| 495 | * transistion is handled. |
| 496 | * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 |
| 497 | */ |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 498 | if (m_rlc.block(bsn)->cs_init == MCS8) |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 499 | m_rlc.block(bsn)->cs_current_trans = |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 500 | MCS8; |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 501 | } else { |
| 502 | /* gprs */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 503 | m_rlc.block(bsn)->cs_current_trans = |
| 504 | m_rlc.block(bsn)->cs_last; |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 505 | } |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 506 | |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 507 | data_len2 = m_rlc.block(bsn)->len; |
| 508 | if (force_data_len > 0 && force_data_len != data_len2) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 509 | return -1; |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 510 | LOGPTBFDL(this, LOGL_DEBUG, "Resending BSN %d\n", bsn); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 511 | /* re-send block with negative aknowlegement */ |
| 512 | m_window.m_v_b.mark_unacked(bsn); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 513 | bts_do_rate_ctr_inc(bts, CTR_RLC_RESENT); |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 514 | } else if (state_is(TBF_ST_FINISHED)) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 515 | /* If the TBF is in finished, we already sent all packages at least once. |
| 516 | * If any packages could have been sent (because of unacked) it should have |
| 517 | * been catched up by the upper if(bsn >= 0) */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 518 | LOGPTBFDL(this, LOGL_DEBUG, |
| 519 | "Restarting at BSN %d, because all blocks have been transmitted.\n", |
| 520 | m_window.v_a()); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 521 | bts_do_rate_ctr_inc(bts, CTR_RLC_RESTARTED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 522 | if (restart_bsn_cycle()) |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 523 | return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 524 | } else if (dl_window_stalled()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 525 | /* There are no more packages to send, but the window is stalled. |
| 526 | * Restart the bsn_cycle to resend all unacked messages */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 527 | LOGPTBFDL(this, LOGL_NOTICE, |
| 528 | "Restarting at BSN %d, because the window is stalled.\n", |
| 529 | m_window.v_a()); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 530 | bts_do_rate_ctr_inc(bts, CTR_RLC_STALLED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 531 | if (restart_bsn_cycle()) |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 532 | return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 533 | } else if (have_data()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 534 | /* The window has space left, generate new bsn */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 535 | LOGPTBFDL(this, LOGL_DEBUG, |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 536 | "Sending new block at BSN %d, CS=%s%s\n", |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 537 | m_window.v_s(), mcs_name(tx_cs), |
| 538 | force_data_len != -1 ? " (forced)" : ""); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 539 | |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 540 | bsn = create_new_bsn(fn, tx_cs); |
Pau Espin Pedrol | 05f9f59 | 2021-01-14 12:56:58 +0100 | [diff] [blame] | 541 | } else if (bts->pcu->vty.dl_tbf_preemptive_retransmission && !m_window.window_empty()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 542 | /* The window contains unacked packages, but not acked. |
| 543 | * Mark unacked bsns as RESEND */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 544 | LOGPTBFDL(this, LOGL_DEBUG, |
| 545 | "Restarting at BSN %d, because all blocks have been transmitted (FLOW).\n", |
| 546 | m_window.v_a()); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 547 | bts_do_rate_ctr_inc(bts, CTR_RLC_RESTARTED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 548 | if (restart_bsn_cycle()) |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 549 | return take_next_bsn(fn, previous_bsn, req_mcs_kind, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 550 | } else { |
| 551 | /* Nothing left to send, create dummy LLC commands */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 552 | LOGPTBFDL(this, LOGL_DEBUG, |
| 553 | "Sending new dummy block at BSN %d, CS=%s\n", |
Pau Espin Pedrol | fc46493 | 2021-01-25 12:05:32 +0100 | [diff] [blame] | 554 | m_window.v_s(), mcs_name(tx_cs)); |
| 555 | bsn = create_new_bsn(fn, tx_cs); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 556 | /* Don't send a second block, so don't set cs_current_trans */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | if (bsn < 0) { |
| 560 | /* we just send final block again */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 561 | LOGPTBFDL(this, LOGL_DEBUG, |
| 562 | "Nothing else to send, Re-transmit final block!\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 563 | bsn = m_window.v_s_mod(-1); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 564 | bts_do_rate_ctr_inc(bts, CTR_RLC_FINAL_BLOCK_RESENT); |
| 565 | bts_do_rate_ctr_inc(bts, CTR_RLC_RESENT); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 566 | } |
| 567 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 568 | *may_combine = num_data_blocks(mcs_header_type(m_rlc.block(bsn)->cs_current_trans)) > 1; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 569 | |
| 570 | return bsn; |
| 571 | } |
| 572 | |
| 573 | /* |
| 574 | * Create DL data block |
| 575 | * The messages are fragmented and forwarded as data blocks. |
| 576 | */ |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 577 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(uint32_t fn, uint8_t ts, enum mcs_kind req_mcs_kind) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 578 | { |
| 579 | int bsn, bsn2 = -1; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 580 | bool may_combine; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 581 | |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 582 | LOGPTBFDL(this, LOGL_DEBUG, "downlink (V(A)==%d .. V(S)==%d) mcs_mode_restrict=%s\n", |
| 583 | m_window.v_a(), m_window.v_s(), mode_name(req_mcs_kind)); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 584 | |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 585 | bsn = take_next_bsn(fn, -1, req_mcs_kind, &may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 586 | if (bsn < 0) |
| 587 | return NULL; |
| 588 | |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 589 | if (may_combine) |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 590 | bsn2 = take_next_bsn(fn, bsn, req_mcs_kind, &may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 591 | |
| 592 | return create_dl_acked_block(fn, ts, bsn, bsn2); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 593 | } |
| 594 | |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 595 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
| 596 | void gprs_rlcmac_dl_tbf::trigger_ass(struct gprs_rlcmac_tbf *old_tbf) |
| 597 | { |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 598 | uint16_t pgroup; |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 599 | /* stop pending timer */ |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 600 | stop_timers("assignment (DL-TBF)"); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 601 | |
| 602 | /* check for downlink tbf: */ |
| 603 | if (old_tbf) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 604 | LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PACCH, because %s exists\n", old_tbf->name()); |
Max | 0e59980 | 2018-01-23 20:09:06 +0100 | [diff] [blame] | 605 | TBF_SET_ASS_STATE_DL(old_tbf, GPRS_RLCMAC_DL_ASS_SEND_ASS); |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 606 | old_tbf->was_releasing = old_tbf->state_is(TBF_ST_WAIT_RELEASE); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 607 | |
| 608 | /* change state */ |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 609 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_ADD_PACCH, NULL); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 610 | |
Pau Espin Pedrol | 039ee82 | 2021-04-26 18:49:33 +0200 | [diff] [blame] | 611 | /* Start timer, expiry in gprs_rlcmac_tbf::handle_timeout tbf_free()s the TBF */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 612 | T_START(this, T0, -2001, "assignment (PACCH)", true); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 613 | } else { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 614 | LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PCH, no TBF exist (IMSI=%s)\n", |
| 615 | imsi()); |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 616 | was_releasing = state_is(TBF_ST_WAIT_RELEASE); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 617 | |
| 618 | /* change state */ |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 619 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_ADD_CCCH, NULL); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 620 | |
| 621 | /* send immediate assignment */ |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 622 | if ((pgroup = imsi2paging_group(imsi())) > 999) |
| 623 | LOGPTBFDL(this, LOGL_ERROR, "IMSI to paging group failed! (%s)\n", imsi()); |
Pau Espin Pedrol | 2c0931c | 2021-03-29 18:40:18 +0200 | [diff] [blame] | 624 | bts_snd_dl_ass(bts, this, pgroup); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 625 | m_wait_confirm = 1; |
| 626 | } |
| 627 | } |
| 628 | |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 629 | void gprs_rlcmac_dl_tbf::schedule_next_frame() |
| 630 | { |
| 631 | struct msgb *msg; |
| 632 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 633 | if (llc_frame_length(&m_llc) != 0) |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 634 | return; |
| 635 | |
| 636 | /* dequeue next LLC frame, if any */ |
Pau Espin Pedrol | db5e339 | 2021-01-21 18:02:40 +0100 | [diff] [blame] | 637 | msg = llc_dequeue(bts->pcu->bssgp.bctx); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 638 | if (!msg) |
| 639 | return; |
| 640 | |
Max | 0fdaa9d | 2018-01-30 16:03:10 +0100 | [diff] [blame] | 641 | LOGPTBFDL(this, LOGL_DEBUG, "Dequeue next LLC (len=%d)\n", msg->len); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 642 | |
| 643 | m_llc.put_frame(msg->data, msg->len); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 644 | bts_do_rate_ctr_inc(bts, CTR_LLC_FRAME_SCHED); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 645 | msgb_free(msg); |
| 646 | m_last_dl_drained_fn = -1; |
| 647 | } |
| 648 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 649 | int gprs_rlcmac_dl_tbf::create_new_bsn(const uint32_t fn, enum CodingScheme cs) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 650 | { |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 651 | uint8_t *data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 652 | gprs_rlc_data *rlc_data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 653 | const uint16_t bsn = m_window.v_s(); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 654 | gprs_rlc_data_block_info *rdbi; |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 655 | int num_chunks = 0; |
| 656 | int write_offset = 0; |
| 657 | Encoding::AppendResult ar; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 658 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 659 | if (llc_frame_length(&m_llc) == 0) |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 660 | schedule_next_frame(); |
| 661 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 662 | OSMO_ASSERT(mcs_is_valid(cs)); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 663 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 664 | /* length of usable data block (single data unit w/o header) */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 665 | const uint8_t block_data_len = mcs_max_data_block_bytes(cs); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 666 | |
| 667 | /* now we still have untransmitted LLC data, so we fill mac block */ |
| 668 | rlc_data = m_rlc.block(bsn); |
Pau Espin Pedrol | 5bb87b8 | 2020-05-18 11:02:39 +0200 | [diff] [blame] | 669 | data = prepare(rlc_data, block_data_len); |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 670 | rlc_data->cs_last = cs; |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 671 | rlc_data->cs_current_trans = cs; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 672 | |
| 673 | /* Initialise the variable related to DL SPB */ |
| 674 | rlc_data->spb_status.block_status_dl = EGPRS_RESEG_DL_DEFAULT; |
| 675 | rlc_data->cs_init = cs; |
| 676 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 677 | rlc_data->len = block_data_len; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 678 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 679 | rdbi = &(rlc_data->block_info); |
| 680 | memset(rdbi, 0, sizeof(*rdbi)); |
| 681 | rdbi->data_len = block_data_len; |
| 682 | |
| 683 | rdbi->cv = 15; /* Final Block Indicator, set late, if true */ |
| 684 | rdbi->bsn = bsn; /* Block Sequence Number */ |
| 685 | rdbi->e = 1; /* Extension bit, maybe set later (1: no extension) */ |
| 686 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 687 | do { |
| 688 | bool is_final; |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 689 | int payload_written = 0; |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 690 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 691 | if (llc_frame_length(&m_llc) == 0) { |
Pau Espin Pedrol | 8afc6ba | 2021-03-02 13:19:39 +0100 | [diff] [blame] | 692 | /* The data just drained, store the current fn */ |
| 693 | if (m_last_dl_drained_fn < 0) |
| 694 | m_last_dl_drained_fn = fn; |
| 695 | |
Pau Espin Pedrol | 7d0f9a0 | 2020-11-27 14:51:27 +0100 | [diff] [blame] | 696 | /* It is not clear, when the next real data will |
| 697 | * arrive, so request a DL ack/nack now */ |
| 698 | request_dl_ack(); |
Alexander Couzens | 1a50661 | 2016-05-24 16:55:30 +0200 | [diff] [blame] | 699 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 700 | int space = block_data_len - write_offset; |
Pau Espin Pedrol | 7d0f9a0 | 2020-11-27 14:51:27 +0100 | [diff] [blame] | 701 | |
| 702 | if (num_chunks != 0) { |
| 703 | /* Nothing to send, and we already put some data in |
| 704 | * rlcmac data block, we are done */ |
| 705 | LOGPTBFDL(this, LOGL_DEBUG, |
| 706 | "LLC queue completely drained and there's " |
| 707 | "still %d free bytes in rlcmac data block\n", space); |
Pau Espin Pedrol | cf6c712 | 2021-03-02 14:15:17 +0100 | [diff] [blame] | 708 | |
| 709 | /* We may need to update fbi in header here |
| 710 | * since m_last_dl_drained_fn was updated above |
| 711 | * Specially important when X2031 is 0. */ |
| 712 | is_final = llc_queue_size(llc_queue()) == 0 && !keep_open(fn); |
| 713 | if (is_final) { |
| 714 | rdbi->cv = 0; |
Pau Espin Pedrol | c32c4a3 | 2021-07-23 18:27:57 +0200 | [diff] [blame] | 715 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_LAST_DL_DATA_SENT, NULL); |
Pau Espin Pedrol | cf6c712 | 2021-03-02 14:15:17 +0100 | [diff] [blame] | 716 | } |
| 717 | |
Pau Espin Pedrol | 7d0f9a0 | 2020-11-27 14:51:27 +0100 | [diff] [blame] | 718 | if (mcs_is_edge(cs)) { |
| 719 | /* in EGPRS there's no M bit, so we need |
| 720 | * to flag padding with LI=127 */ |
| 721 | Encoding::rlc_data_to_dl_append_egprs_li_padding(rdbi, |
| 722 | &write_offset, |
| 723 | &num_chunks, |
| 724 | data); |
| 725 | } |
| 726 | break; |
| 727 | } |
| 728 | |
| 729 | /* Nothing to send from upper layers (LLC), but still |
| 730 | * requested to send something to MS to delay the |
| 731 | * release of the TBF. See 3GPP TS 44.060 9.3.1a |
| 732 | * "Delayed release of downlink Temporary Block Flow" */ |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 733 | /* A header will need to by added, so we just need |
| 734 | * space-1 octets */ |
| 735 | m_llc.put_dummy_frame(space - 1); |
| 736 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 737 | LOGPTBFDL(this, LOGL_DEBUG, |
| 738 | "Empty chunk, added LLC dummy command of size %d, drained_since=%d\n", |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 739 | llc_frame_length(&m_llc), frames_since_last_drain(fn)); |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 740 | } |
| 741 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 742 | is_final = llc_queue_size(llc_queue()) == 0 && !keep_open(fn); |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 743 | |
Jacob Erlbeck | 5058bd6 | 2016-01-13 10:51:25 +0100 | [diff] [blame] | 744 | ar = Encoding::rlc_data_to_dl_append(rdbi, cs, |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 745 | &m_llc, &write_offset, &num_chunks, data, is_final, &payload_written); |
| 746 | |
| 747 | if (payload_written > 0) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 748 | bts_do_rate_ctr_add(bts, CTR_RLC_DL_PAYLOAD_BYTES, payload_written); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 749 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 750 | if (ar == Encoding::AR_NEED_MORE_BLOCKS) |
| 751 | break; |
| 752 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 753 | LOGPTBFDL(this, LOGL_DEBUG, "Complete DL frame, len=%d\n", llc_frame_length(&m_llc)); |
| 754 | gprs_rlcmac_dl_bw(this, llc_frame_length(&m_llc)); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 755 | bts_do_rate_ctr_add(bts, CTR_LLC_DL_BYTES, llc_frame_length(&m_llc)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 756 | m_llc.reset(); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 757 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 758 | if (is_final) { |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 759 | request_dl_ack(); |
Pau Espin Pedrol | c32c4a3 | 2021-07-23 18:27:57 +0200 | [diff] [blame] | 760 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_LAST_DL_DATA_SENT, NULL); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 761 | } |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 762 | |
| 763 | /* dequeue next LLC frame, if any */ |
| 764 | schedule_next_frame(); |
| 765 | } while (ar == Encoding::AR_COMPLETED_SPACE_LEFT); |
| 766 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 767 | LOGPTBFDL(this, LOGL_DEBUG, "data block (BSN %d, %s): %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 768 | bsn, mcs_name(rlc_data->cs_last), |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 769 | osmo_hexdump(rlc_data->block, block_data_len)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 770 | /* raise send state and set ack state array */ |
| 771 | m_window.m_v_b.mark_unacked(bsn); |
| 772 | m_window.increment_send(); |
| 773 | |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 774 | return bsn; |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 775 | } |
| 776 | |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 777 | bool gprs_rlcmac_dl_tbf::handle_ack_nack() |
| 778 | { |
| 779 | bool ack_recovered = false; |
| 780 | |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 781 | state_fsm.state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
Max | 8dce1de | 2018-01-02 14:17:04 +0100 | [diff] [blame] | 782 | if (check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ACK)) { |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 783 | ack_recovered = true; |
| 784 | } |
| 785 | |
| 786 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 787 | n_reset(N3105); |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 788 | t_stop(T3191, "ACK/NACK received"); |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 789 | |
| 790 | return ack_recovered; |
| 791 | } |
| 792 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 793 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( |
| 794 | const uint32_t fn, const uint8_t ts, |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 795 | int index, int index2) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 796 | { |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 797 | uint8_t *msg_data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 798 | struct msgb *dl_msg; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 799 | unsigned msg_len; |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 800 | bool need_poll; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 801 | /* TODO: support MCS-7 - MCS-9, where data_block_idx can be 1 */ |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 802 | uint8_t data_block_idx = 0; |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 803 | unsigned int rrbp; |
| 804 | uint32_t new_poll_fn; |
| 805 | int rc; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 806 | bool is_final = false; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 807 | gprs_rlc_data_info rlc; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 808 | enum CodingScheme cs; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 809 | int bsns[ARRAY_SIZE(rlc.block_info)]; |
| 810 | unsigned num_bsns; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 811 | bool need_padding = false; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 812 | enum egprs_rlcmac_dl_spb spb = EGPRS_RLCMAC_DL_NO_RETX; |
| 813 | unsigned int spb_status = get_egprs_dl_spb_status(index); |
Neels Hofmeyr | b609190 | 2017-02-08 16:49:20 +0100 | [diff] [blame] | 814 | |
| 815 | enum egprs_puncturing_values punct[2] = { |
| 816 | EGPRS_PS_INVALID, EGPRS_PS_INVALID |
| 817 | }; |
| 818 | osmo_static_assert(ARRAY_SIZE(rlc.block_info) == 2, |
| 819 | rlc_block_info_size_is_two); |
| 820 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 821 | /* |
| 822 | * TODO: This is an experimental work-around to put 2 BSN into |
| 823 | * MSC-7 to MCS-9 encoded messages. It just sends the same BSN |
| 824 | * twice in the block. The cs should be derived from the TBF's |
| 825 | * current CS such that both BSNs (that must be compatible) can |
| 826 | * be put into the data area, even if the resulting CS is higher than |
| 827 | * the current limit. |
| 828 | */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 829 | cs = m_rlc.block(index)->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 830 | enum CodingScheme cs_init = m_rlc.block(index)->cs_init; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 831 | bsns[0] = index; |
| 832 | num_bsns = 1; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 833 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 834 | if (index2 >= 0) { |
| 835 | bsns[num_bsns] = index2; |
| 836 | num_bsns += 1; |
| 837 | } |
| 838 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 839 | update_coding_scheme_counter_dl(cs); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 840 | /* |
| 841 | * if the intial mcs is 8 and retransmission mcs is either 6 or 3 |
| 842 | * we have to include the padding of 6 octets in first segment |
| 843 | */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 844 | if ((cs_init == MCS8) && |
| 845 | (cs == MCS6 || cs == MCS3)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 846 | if (spb_status == EGPRS_RESEG_DL_DEFAULT || |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 847 | spb_status == EGPRS_RESEG_SECOND_SEG_SENT) |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 848 | need_padding = true; |
| 849 | } else if (num_bsns == 1) { |
Jacob Erlbeck | be881c0 | 2016-02-03 20:44:46 +0100 | [diff] [blame] | 850 | /* TODO: remove the conditional when MCS-6 padding isn't |
| 851 | * failing to be decoded by MEs anymore */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 852 | /* TODO: support of MCS-8 -> MCS-6 transition should be |
| 853 | * handled |
| 854 | * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 |
| 855 | * dated 2016-02-07 23:45:40 (UTC) |
| 856 | */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 857 | if (cs != MCS8) |
| 858 | mcs_dec_to_single_block(&cs, &need_padding); |
Jacob Erlbeck | be881c0 | 2016-02-03 20:44:46 +0100 | [diff] [blame] | 859 | } |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 860 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 861 | spb = get_egprs_dl_spb(index); |
| 862 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 863 | LOGPTBFDL(this, LOGL_DEBUG, "need_padding %d spb_status %d spb %d (BSN1 %d BSN2 %d)\n", |
| 864 | need_padding, spb_status, spb, index, index2); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 865 | |
| 866 | gprs_rlc_data_info_init_dl(&rlc, cs, need_padding, spb); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 867 | |
| 868 | rlc.usf = 7; /* will be set at scheduler */ |
| 869 | rlc.pr = 0; /* FIXME: power reduction */ |
| 870 | rlc.tfi = m_tfi; /* TFI */ |
| 871 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 872 | /* return data block(s) as message */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 873 | msg_len = mcs_size_dl(cs); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 874 | dl_msg = msgb_alloc(msg_len, "rlcmac_dl_data"); |
| 875 | if (!dl_msg) |
| 876 | return NULL; |
| 877 | |
| 878 | msg_data = msgb_put(dl_msg, msg_len); |
| 879 | |
Aravind Sirsikar | b119198 | 2016-08-26 18:13:10 +0530 | [diff] [blame] | 880 | OSMO_ASSERT(rlc.num_data_blocks <= ARRAY_SIZE(rlc.block_info)); |
| 881 | OSMO_ASSERT(rlc.num_data_blocks > 0); |
| 882 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 883 | LOGPTBFDL(this, LOGL_DEBUG, "Copying %u RLC blocks, %u BSNs\n", rlc.num_data_blocks, num_bsns); |
Max | 5759a19 | 2017-09-08 12:23:12 +0200 | [diff] [blame] | 884 | |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 885 | /* Copy block(s) to RLC message: the num_data_blocks cannot be more than 2 - see assert above */ |
| 886 | for (data_block_idx = 0; data_block_idx < OSMO_MIN(rlc.num_data_blocks, 2); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 887 | data_block_idx++) |
| 888 | { |
| 889 | int bsn; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 890 | uint8_t *block_data; |
| 891 | gprs_rlc_data_block_info *rdbi, *block_info; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 892 | enum egprs_rlc_dl_reseg_bsn_state reseg_status; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 893 | |
| 894 | /* Check if there are more blocks than BSNs */ |
| 895 | if (data_block_idx < num_bsns) |
| 896 | bsn = bsns[data_block_idx]; |
| 897 | else |
| 898 | bsn = bsns[0]; |
| 899 | |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 900 | /* Get current puncturing scheme from block */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 901 | |
| 902 | m_rlc.block(bsn)->next_ps = gprs_get_punct_scheme( |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 903 | m_rlc.block(bsn)->next_ps, |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 904 | m_rlc.block(bsn)->cs_last, cs, spb); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 905 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 906 | if (mcs_is_edge(cs)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 907 | OSMO_ASSERT(m_rlc.block(bsn)->next_ps >= EGPRS_PS_1); |
| 908 | OSMO_ASSERT(m_rlc.block(bsn)->next_ps <= EGPRS_PS_3); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 909 | } |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 910 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 911 | punct[data_block_idx] = m_rlc.block(bsn)->next_ps; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 912 | |
| 913 | rdbi = &rlc.block_info[data_block_idx]; |
| 914 | block_info = &m_rlc.block(bsn)->block_info; |
| 915 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 916 | /* |
| 917 | * get data and header from current block |
| 918 | * function returns the reseg status |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 919 | */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 920 | reseg_status = egprs_dl_get_data(bsn, &block_data); |
| 921 | m_rlc.block(bsn)->spb_status.block_status_dl = reseg_status; |
| 922 | |
| 923 | /* |
| 924 | * If it is first segment of the split block set the state of |
| 925 | * bsn to nacked. If it is the first segment dont update the |
| 926 | * next ps value of bsn. since next segment also needs same cps |
| 927 | */ |
| 928 | if (spb == EGPRS_RLCMAC_DL_FIRST_SEG) |
| 929 | m_window.m_v_b.mark_nacked(bsn); |
| 930 | else { |
| 931 | /* |
| 932 | * TODO: Need to handle 2 same bsns |
| 933 | * in header type 1 |
| 934 | */ |
| 935 | gprs_update_punct_scheme(&m_rlc.block(bsn)->next_ps, |
| 936 | cs); |
| 937 | } |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 938 | |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 939 | m_rlc.block(bsn)->cs_last = cs; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 940 | rdbi->e = block_info->e; |
| 941 | rdbi->cv = block_info->cv; |
| 942 | rdbi->bsn = bsn; |
| 943 | is_final = is_final || rdbi->cv == 0; |
| 944 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 945 | LOGPTBFDL(this, LOGL_DEBUG, "Copying data unit %d (BSN %d)\n", |
| 946 | data_block_idx, bsn); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 947 | |
| 948 | Encoding::rlc_copy_from_aligned_buffer(&rlc, data_block_idx, |
| 949 | msg_data, block_data); |
| 950 | } |
| 951 | |
Neels Hofmeyr | 49b83ec | 2017-02-08 15:47:19 +0100 | [diff] [blame] | 952 | /* Calculate CPS only for EGPRS case */ |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 953 | if (mcs_is_edge(cs)) |
Neels Hofmeyr | 49b83ec | 2017-02-08 15:47:19 +0100 | [diff] [blame] | 954 | rlc.cps = gprs_rlc_mcs_cps(cs, punct[0], punct[1], need_padding); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 955 | |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 956 | /* If the TBF has just started, relate frames_since_last_poll to the |
| 957 | * current fn */ |
| 958 | if (m_last_dl_poll_fn < 0) |
| 959 | m_last_dl_poll_fn = fn; |
| 960 | |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 961 | need_poll = state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 962 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 963 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 964 | */ |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 965 | if (m_tx_counter >= POLL_ACK_AFTER_FRAMES || m_dl_ack_requested || |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 966 | need_poll) { |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 967 | if (m_dl_ack_requested) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 968 | LOGPTBFDL(this, LOGL_DEBUG, |
Pau Espin Pedrol | 30f6617 | 2019-12-04 18:07:49 +0100 | [diff] [blame] | 969 | "Scheduling Ack/Nack polling, because it was requested explicitly " |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 970 | "(e.g. first final block sent).\n"); |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 971 | } else if (need_poll) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 972 | LOGPTBFDL(this, LOGL_DEBUG, |
| 973 | "Scheduling Ack/Nack polling, because polling timed out.\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 974 | } else { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 975 | LOGPTBFDL(this, LOGL_DEBUG, |
| 976 | "Scheduling Ack/Nack polling, because %d blocks sent.\n", |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 977 | POLL_ACK_AFTER_FRAMES); |
| 978 | } |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 979 | |
| 980 | rc = check_polling(fn, ts, &new_poll_fn, &rrbp); |
| 981 | if (rc >= 0) { |
Pau Espin Pedrol | 86580e1 | 2021-03-29 18:15:30 +0200 | [diff] [blame] | 982 | set_polling(new_poll_fn, ts, PDCH_ULC_POLL_DL_ACK); |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 983 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 984 | m_tx_counter = 0; |
| 985 | /* start timer whenever we send the final block */ |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 986 | if (is_final) |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 987 | T_START(this, T3191, 3191, "final block (DL-TBF)", true); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 988 | |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 989 | state_fsm.state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); /* clear poll timeout flag */ |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 990 | |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 991 | /* Clear request flag */ |
| 992 | m_dl_ack_requested = false; |
| 993 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 994 | /* set polling in header */ |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 995 | rlc.rrbp = rrbp; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 996 | rlc.es_p = 1; /* Polling */ |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 997 | |
Pau Espin Pedrol | 58046e4 | 2021-03-29 19:01:13 +0200 | [diff] [blame] | 998 | m_last_dl_poll_fn = new_poll_fn; |
Jacob Erlbeck | 16d29c7 | 2015-08-24 13:30:39 +0200 | [diff] [blame] | 999 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1000 | LOGPTBFDL(this, LOGL_INFO, |
| 1001 | "Scheduled Ack/Nack polling on FN=%d, TS=%d\n", |
Pau Espin Pedrol | 16e1678 | 2021-03-29 19:10:19 +0200 | [diff] [blame] | 1002 | new_poll_fn, ts); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1003 | } |
| 1004 | } |
| 1005 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 1006 | Encoding::rlc_write_dl_data_header(&rlc, msg_data); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 1007 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1008 | LOGPTBFDL(this, LOGL_DEBUG, "msg block (BSN %d, %s%s): %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 1009 | index, mcs_name(cs), |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1010 | need_padding ? ", padded" : "", |
| 1011 | msgb_hexdump(dl_msg)); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 1012 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1013 | /* Increment TX-counter */ |
| 1014 | m_tx_counter++; |
| 1015 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1016 | return dl_msg; |
| 1017 | } |
| 1018 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1019 | static uint16_t bitnum_to_bsn(int bitnum, uint16_t ssn) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1020 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1021 | return ssn - 1 - bitnum; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1022 | } |
| 1023 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1024 | int gprs_rlcmac_dl_tbf::analyse_errors(char *show_rbb, uint8_t ssn, |
| 1025 | ana_result *res) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1026 | { |
| 1027 | gprs_rlc_data *rlc_data; |
| 1028 | uint16_t lost = 0, received = 0, skipped = 0; |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 1029 | char info[RLC_MAX_WS + 1]; |
| 1030 | memset(info, '.', m_window.ws()); |
| 1031 | info[m_window.ws()] = 0; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1032 | uint16_t bsn = 0; |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1033 | unsigned received_bytes = 0, lost_bytes = 0; |
| 1034 | unsigned received_packets = 0, lost_packets = 0; |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 1035 | unsigned num_blocks = strlen(show_rbb); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1036 | |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 1037 | unsigned distance = m_window.distance(); |
| 1038 | |
| 1039 | num_blocks = num_blocks > distance |
| 1040 | ? distance : num_blocks; |
| 1041 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1042 | /* SSN - 1 is in range V(A)..V(S)-1 */ |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 1043 | for (unsigned int bitpos = 0; bitpos < num_blocks; bitpos++) { |
| 1044 | bool is_received; |
| 1045 | int index = num_blocks - 1 - bitpos; |
| 1046 | |
| 1047 | is_received = (index >= 0 && show_rbb[index] == 'R'); |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1048 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1049 | bsn = m_window.mod_sns(bitnum_to_bsn(bitpos, ssn)); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1050 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1051 | if (bsn == m_window.mod_sns(m_window.v_a() - 1)) { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1052 | info[bitpos] = '$'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1053 | break; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1054 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1055 | |
| 1056 | rlc_data = m_rlc.block(bsn); |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1057 | if (!rlc_data) { |
| 1058 | info[bitpos] = '0'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1059 | continue; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1060 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1061 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1062 | /* Get general statistics */ |
| 1063 | if (is_received && !m_window.m_v_b.is_acked(bsn)) { |
| 1064 | received_packets += 1; |
| 1065 | received_bytes += rlc_data->len; |
| 1066 | } else if (!is_received && !m_window.m_v_b.is_nacked(bsn)) { |
| 1067 | lost_packets += 1; |
| 1068 | lost_bytes += rlc_data->len; |
| 1069 | } |
| 1070 | |
| 1071 | /* Get statistics for current CS */ |
| 1072 | |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 1073 | if (rlc_data->cs_last != current_cs()) { |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1074 | /* This block has already been encoded with a different |
| 1075 | * CS, so it doesn't help us to decide, whether the |
| 1076 | * current CS is ok. Ignore it. */ |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1077 | info[bitpos] = 'x'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1078 | skipped += 1; |
| 1079 | continue; |
| 1080 | } |
| 1081 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1082 | if (is_received) { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1083 | if (!m_window.m_v_b.is_acked(bsn)) { |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1084 | received += 1; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1085 | info[bitpos] = 'R'; |
| 1086 | } else { |
| 1087 | info[bitpos] = 'r'; |
| 1088 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1089 | } else { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 1090 | info[bitpos] = 'L'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1091 | lost += 1; |
| 1092 | } |
| 1093 | } |
| 1094 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1095 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1096 | "DL analysis, range=%d:%d, lost=%d, recv=%d, skipped=%d, bsn=%d, info='%s'\n", |
| 1097 | m_window.v_a(), m_window.v_s(), lost, received, skipped, bsn, info); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1098 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1099 | res->received_packets = received_packets; |
| 1100 | res->lost_packets = lost_packets; |
| 1101 | res->received_bytes = received_bytes; |
| 1102 | res->lost_bytes = lost_bytes; |
| 1103 | |
Jacob Erlbeck | 144a1d0 | 2015-06-04 16:51:44 +0200 | [diff] [blame] | 1104 | if (lost + received <= 1) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1105 | return -1; |
| 1106 | |
| 1107 | return lost * 100 / (lost + received); |
| 1108 | } |
| 1109 | |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 1110 | gprs_rlc_window *gprs_rlcmac_dl_tbf::window() |
Max | ea98b7d | 2018-01-04 15:13:27 +0100 | [diff] [blame] | 1111 | { |
| 1112 | return &m_window; |
| 1113 | } |
| 1114 | |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1115 | int gprs_rlcmac_dl_tbf::update_window(unsigned first_bsn, |
| 1116 | const struct bitvec *rbb) |
| 1117 | { |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 1118 | unsigned dist; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1119 | uint16_t lost = 0, received = 0; |
| 1120 | char show_v_b[RLC_MAX_SNS + 1]; |
| 1121 | char show_rbb[RLC_MAX_SNS + 1]; |
| 1122 | int error_rate; |
| 1123 | struct ana_result ana_res; |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 1124 | dist = m_window.distance(); |
| 1125 | unsigned num_blocks = rbb->cur_bit > dist |
| 1126 | ? dist : rbb->cur_bit; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1127 | unsigned behind_last_bsn = m_window.mod_sns(first_bsn + num_blocks); |
| 1128 | |
| 1129 | Decoding::extract_rbb(rbb, show_rbb); |
| 1130 | /* show received array in debug */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1131 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1132 | "ack: (BSN=%d)\"%s\"(BSN=%d) R=ACK I=NACK\n", |
| 1133 | first_bsn, show_rbb, m_window.mod_sns(behind_last_bsn - 1)); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1134 | |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1135 | error_rate = analyse_errors(show_rbb, behind_last_bsn, &ana_res); |
| 1136 | |
Pau Espin Pedrol | e8dcf64 | 2021-01-14 13:17:01 +0100 | [diff] [blame] | 1137 | if (the_pcu->vty.cs_adj_enabled && ms()) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1138 | ms_update_error_rate(ms(), this, error_rate); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1139 | |
| 1140 | m_window.update(bts, rbb, first_bsn, &lost, &received); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1141 | rate_ctr_add(rate_ctr_group_get_ctr(m_ctrs, TBF_CTR_RLC_NACKED), lost); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1142 | |
| 1143 | /* report lost and received packets */ |
| 1144 | gprs_rlcmac_received_lost(this, received, lost); |
| 1145 | |
| 1146 | /* Used to measure the leak rate */ |
| 1147 | gprs_bssgp_update_bytes_received(ana_res.received_bytes, |
| 1148 | ana_res.received_packets + ana_res.lost_packets); |
| 1149 | |
| 1150 | /* raise V(A), if possible */ |
| 1151 | m_window.raise(m_window.move_window()); |
| 1152 | |
| 1153 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 1154 | m_window.show_state(show_v_b); |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1155 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1156 | "V(B): (V(A)=%d)\"%s\"(V(S)-1=%d) A=Acked N=Nacked U=Unacked X=Resend-Unacked I=Invalid\n", |
| 1157 | m_window.v_a(), show_v_b, m_window.v_s_mod(-1)); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1158 | return 0; |
| 1159 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1160 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1161 | int gprs_rlcmac_dl_tbf::update_window(const uint8_t ssn, const uint8_t *rbb) |
| 1162 | { |
| 1163 | int16_t dist; /* must be signed */ |
| 1164 | uint16_t lost = 0, received = 0; |
| 1165 | char show_rbb[65]; |
| 1166 | char show_v_b[RLC_MAX_SNS + 1]; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1167 | int error_rate; |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1168 | struct ana_result ana_res; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1169 | |
| 1170 | Decoding::extract_rbb(rbb, show_rbb); |
| 1171 | /* show received array in debug (bit 64..1) */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1172 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1173 | "ack: (BSN=%d)\"%s\"(BSN=%d) R=ACK I=NACK\n", |
| 1174 | m_window.mod_sns(ssn - 64), show_rbb, m_window.mod_sns(ssn - 1)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1175 | |
| 1176 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1177 | /* calculate distance of ssn from V(S) */ |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1178 | dist = m_window.mod_sns(m_window.v_s() - ssn); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1179 | /* check if distance is less than distance V(A)..V(S) */ |
| 1180 | if (dist >= m_window.distance()) { |
| 1181 | /* this might happpen, if the downlink assignment |
| 1182 | * was not received by ms and the ack refers |
| 1183 | * to previous TBF |
| 1184 | * FIXME: we should implement polling for |
| 1185 | * control ack!*/ |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1186 | LOGPTBFDL(this, LOGL_NOTICE, "ack range is out of V(A)..V(S) range - Free TBF!\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1187 | return 1; /* indicate to free TBF */ |
| 1188 | } |
| 1189 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1190 | error_rate = analyse_errors(show_rbb, ssn, &ana_res); |
| 1191 | |
Pau Espin Pedrol | e8dcf64 | 2021-01-14 13:17:01 +0100 | [diff] [blame] | 1192 | if (the_pcu->vty.cs_adj_enabled && ms()) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1193 | ms_update_error_rate(ms(), this, error_rate); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1194 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1195 | m_window.update(bts, show_rbb, ssn, |
| 1196 | &lost, &received); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1197 | rate_ctr_add(rate_ctr_group_get_ctr(m_ctrs, TBF_CTR_RLC_NACKED), lost); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1198 | |
| 1199 | /* report lost and received packets */ |
| 1200 | gprs_rlcmac_received_lost(this, received, lost); |
| 1201 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1202 | /* Used to measure the leak rate */ |
| 1203 | gprs_bssgp_update_bytes_received(ana_res.received_bytes, |
| 1204 | ana_res.received_packets + ana_res.lost_packets); |
| 1205 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1206 | /* raise V(A), if possible */ |
| 1207 | m_window.raise(m_window.move_window()); |
| 1208 | |
| 1209 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 1210 | m_window.show_state(show_v_b); |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1211 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1212 | "V(B): (V(A)=%d)\"%s\"(V(S)-1=%d) A=Acked N=Nacked U=Unacked X=Resend-Unacked I=Invalid\n", |
| 1213 | m_window.v_a(), show_v_b, m_window.v_s_mod(-1)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1214 | |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 1215 | if (state_is(TBF_ST_FINISHED) && m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1216 | LOGPTBFDL(this, LOGL_NOTICE, |
| 1217 | "Received acknowledge of all blocks, but without final ack inidcation (don't worry)\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1218 | } |
| 1219 | return 0; |
| 1220 | } |
| 1221 | |
| 1222 | |
Pau Espin Pedrol | efcb046 | 2021-07-26 12:33:39 +0200 | [diff] [blame] | 1223 | int gprs_rlcmac_dl_tbf::rcvd_dl_final_ack() |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1224 | { |
Pau Espin Pedrol | efcb046 | 2021-07-26 12:33:39 +0200 | [diff] [blame] | 1225 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_FINAL_ACK_RECVD, NULL); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1226 | release(); |
| 1227 | |
| 1228 | /* check for LLC PDU in the LLC Queue */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1229 | if (llc_queue_size(llc_queue()) > 0) |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1230 | /* we have more data so we will re-use this tbf */ |
| 1231 | establish_dl_tbf_on_pacch(); |
| 1232 | |
| 1233 | return 0; |
| 1234 | } |
| 1235 | |
| 1236 | int gprs_rlcmac_dl_tbf::release() |
| 1237 | { |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1238 | uint16_t received; |
| 1239 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1240 | /* range V(A)..V(S)-1 */ |
| 1241 | received = m_window.count_unacked(); |
| 1242 | |
| 1243 | /* report all outstanding packets as received */ |
| 1244 | gprs_rlcmac_received_lost(this, received, 0); |
| 1245 | |
Jacob Erlbeck | 04e72d3 | 2015-08-13 18:36:56 +0200 | [diff] [blame] | 1246 | /* start T3193 */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 1247 | T_START(this, T3193, 3193, "release (DL-TBF)", true); |
Jacob Erlbeck | 04e72d3 | 2015-08-13 18:36:56 +0200 | [diff] [blame] | 1248 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1249 | /* reset rlc states */ |
| 1250 | m_tx_counter = 0; |
| 1251 | m_wait_confirm = 0; |
| 1252 | m_window.reset(); |
| 1253 | |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 1254 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_DEL_CCCH, NULL); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1255 | |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1256 | return 0; |
| 1257 | } |
| 1258 | |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1259 | int gprs_rlcmac_dl_tbf::abort() |
| 1260 | { |
| 1261 | uint16_t lost; |
| 1262 | |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 1263 | if (state_is(TBF_ST_FLOW)) { |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1264 | /* range V(A)..V(S)-1 */ |
| 1265 | lost = m_window.count_unacked(); |
| 1266 | |
| 1267 | /* report all outstanding packets as lost */ |
| 1268 | gprs_rlcmac_received_lost(this, 0, lost); |
| 1269 | gprs_rlcmac_lost_rep(this); |
| 1270 | |
| 1271 | /* TODO: Reschedule all LLC frames starting with the one that is |
| 1272 | * (partly) encoded in chunk 1 of block V(A). (optional) */ |
| 1273 | } |
| 1274 | |
Pau Espin Pedrol | 55f600b | 2021-07-26 15:54:39 +0200 | [diff] [blame] | 1275 | /* This state change looks unneeded and can probably be dropped at some point: */ |
| 1276 | tbf_fsm_state_chg(this->state_fsm.fi, TBF_ST_RELEASING); |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1277 | |
| 1278 | /* reset rlc states */ |
| 1279 | m_window.reset(); |
| 1280 | |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 1281 | osmo_fsm_inst_dispatch(this->state_fsm.fi, TBF_EV_ASSIGN_DEL_CCCH, NULL); |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1282 | |
| 1283 | return 0; |
| 1284 | } |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1285 | |
Max | 7df82d4 | 2017-12-15 11:14:30 +0100 | [diff] [blame] | 1286 | int gprs_rlcmac_dl_tbf::rcvd_dl_ack(bool final_ack, unsigned first_bsn, |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1287 | struct bitvec *rbb) |
| 1288 | { |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1289 | int rc; |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1290 | LOGPTBFDL(this, LOGL_DEBUG, "downlink acknowledge\n"); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1291 | |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1292 | rc = update_window(first_bsn, rbb); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1293 | |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1294 | if (final_ack) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1295 | LOGPTBFDL(this, LOGL_DEBUG, "Final ACK received.\n"); |
Pau Espin Pedrol | efcb046 | 2021-07-26 12:33:39 +0200 | [diff] [blame] | 1296 | rc = rcvd_dl_final_ack(); |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 1297 | } else if (state_is(TBF_ST_FINISHED) && m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1298 | LOGPTBFDL(this, LOGL_NOTICE, |
| 1299 | "Received acknowledge of all blocks, but without final ack indication (don't worry)\n"); |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1300 | } |
| 1301 | |
| 1302 | return rc; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1303 | } |
| 1304 | |
Max | 7df82d4 | 2017-12-15 11:14:30 +0100 | [diff] [blame] | 1305 | int gprs_rlcmac_dl_tbf::rcvd_dl_ack(bool final_ack, uint8_t ssn, uint8_t *rbb) |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1306 | { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1307 | LOGPTBFDL(this, LOGL_DEBUG, "downlink acknowledge\n"); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1308 | |
| 1309 | if (!final_ack) |
| 1310 | return update_window(ssn, rbb); |
| 1311 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1312 | LOGPTBFDL(this, LOGL_DEBUG, "Final ACK received.\n"); |
Pau Espin Pedrol | efcb046 | 2021-07-26 12:33:39 +0200 | [diff] [blame] | 1313 | return rcvd_dl_final_ack(); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | bool gprs_rlcmac_dl_tbf::dl_window_stalled() const |
| 1317 | { |
| 1318 | return m_window.window_stalled(); |
| 1319 | } |
| 1320 | |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1321 | void gprs_rlcmac_dl_tbf::request_dl_ack() |
| 1322 | { |
| 1323 | m_dl_ack_requested = true; |
| 1324 | } |
| 1325 | |
| 1326 | bool gprs_rlcmac_dl_tbf::need_control_ts() const |
| 1327 | { |
Pau Espin Pedrol | 33e8007 | 2021-07-22 19:20:50 +0200 | [diff] [blame] | 1328 | return state_fsm.state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK) || |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1329 | m_tx_counter >= POLL_ACK_AFTER_FRAMES || |
| 1330 | m_dl_ack_requested; |
| 1331 | } |
| 1332 | |
| 1333 | bool gprs_rlcmac_dl_tbf::have_data() const |
| 1334 | { |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1335 | return llc_chunk_size(&m_llc) > 0 || |
| 1336 | (llc_queue_size(llc_queue()) > 0); |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1337 | } |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1338 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1339 | static inline int frames_since_last(int32_t last, unsigned fn) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1340 | { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1341 | unsigned wrapped = (fn + GSM_MAX_FN - last) % GSM_MAX_FN; |
| 1342 | |
| 1343 | if (last < 0) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1344 | return -1; |
| 1345 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1346 | if (wrapped < GSM_MAX_FN/2) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1347 | return wrapped; |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1348 | |
| 1349 | return wrapped - GSM_MAX_FN; |
| 1350 | } |
| 1351 | |
| 1352 | int gprs_rlcmac_dl_tbf::frames_since_last_poll(unsigned fn) const |
| 1353 | { |
| 1354 | return frames_since_last(m_last_dl_poll_fn, fn); |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1355 | } |
| 1356 | |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1357 | int gprs_rlcmac_dl_tbf::frames_since_last_drain(unsigned fn) const |
| 1358 | { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1359 | return frames_since_last(m_last_dl_drained_fn, fn); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | bool gprs_rlcmac_dl_tbf::keep_open(unsigned fn) const |
| 1363 | { |
| 1364 | int keep_time_frames; |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1365 | unsigned long dl_tbf_idle_msec; |
Pau Espin Pedrol | 5b9d0bb | 2021-03-02 12:53:58 +0100 | [diff] [blame] | 1366 | int since_last_drain; |
| 1367 | bool keep; |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1368 | |
Pau Espin Pedrol | 924aaad | 2021-01-14 12:01:42 +0100 | [diff] [blame] | 1369 | dl_tbf_idle_msec = osmo_tdef_get(the_pcu->T_defs, -2031, OSMO_TDEF_MS, -1); |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1370 | if (dl_tbf_idle_msec == 0) |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1371 | return false; |
| 1372 | |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1373 | keep_time_frames = msecs_to_frames(dl_tbf_idle_msec); |
Pau Espin Pedrol | 5b9d0bb | 2021-03-02 12:53:58 +0100 | [diff] [blame] | 1374 | since_last_drain = frames_since_last_drain(fn); |
| 1375 | keep = since_last_drain <= keep_time_frames; |
| 1376 | |
| 1377 | if (since_last_drain >= 0) |
| 1378 | LOGPTBFDL(this, LOGL_DEBUG, "Keep idle TBF open: %d/%d -> %s\n", |
| 1379 | since_last_drain, keep_time_frames, keep ? "yes" : "no"); |
| 1380 | return keep; |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1381 | } |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1382 | |
| 1383 | /* |
| 1384 | * This function returns the pointer to data which needs |
| 1385 | * to be copied. Also updates the status of the block related to |
| 1386 | * Split block handling in the RLC/MAC block. |
| 1387 | */ |
| 1388 | enum egprs_rlc_dl_reseg_bsn_state |
| 1389 | gprs_rlcmac_dl_tbf::egprs_dl_get_data(int bsn, uint8_t **block_data) |
| 1390 | { |
| 1391 | gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
| 1392 | egprs_rlc_dl_reseg_bsn_state *block_status_dl = |
| 1393 | &rlc_data->spb_status.block_status_dl; |
| 1394 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1395 | enum CodingScheme cs_init = rlc_data->cs_init; |
| 1396 | enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1397 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1398 | enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); |
| 1399 | enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1400 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1401 | *block_data = &rlc_data->block[0]; |
| 1402 | |
| 1403 | /* |
| 1404 | * Table 10.3a.0.1 of 44.060 |
| 1405 | * MCS6,9: second segment starts at 74/2 = 37 |
| 1406 | * MCS5,7: second segment starts at 56/2 = 28 |
| 1407 | * MCS8: second segment starts at 31 |
| 1408 | * MCS4: second segment starts at 44/2 = 22 |
| 1409 | */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1410 | if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1411 | if (*block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1412 | switch (cs_init) { |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1413 | case MCS6 : |
| 1414 | case MCS9 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1415 | *block_data = &rlc_data->block[37]; |
| 1416 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1417 | case MCS7 : |
| 1418 | case MCS5 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1419 | *block_data = &rlc_data->block[28]; |
| 1420 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1421 | case MCS8 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1422 | *block_data = &rlc_data->block[31]; |
| 1423 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1424 | case MCS4 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1425 | *block_data = &rlc_data->block[22]; |
| 1426 | break; |
| 1427 | default: |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1428 | LOGPTBFDL(this, LOGL_ERROR, |
| 1429 | "FIXME: Software error: hit invalid condition. " |
| 1430 | "headerType(%d) blockstatus(%d) cs(%s) PLEASE FIX!\n", |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1431 | ht_cs_current_trans, |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 1432 | *block_status_dl, mcs_name(cs_init)); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1433 | break; |
| 1434 | |
| 1435 | } |
| 1436 | return EGPRS_RESEG_SECOND_SEG_SENT; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1437 | } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || |
| 1438 | (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1439 | return EGPRS_RESEG_FIRST_SEG_SENT; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1440 | } else if ((cs_init == MCS4) && |
| 1441 | (cs_current_trans == MCS1)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1442 | return EGPRS_RESEG_FIRST_SEG_SENT; |
| 1443 | } |
| 1444 | } |
| 1445 | return EGPRS_RESEG_DL_DEFAULT; |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * This function returns the status of split block |
| 1450 | * for RLC/MAC block. |
| 1451 | */ |
| 1452 | unsigned int gprs_rlcmac_dl_tbf::get_egprs_dl_spb_status(const int bsn) |
| 1453 | { |
| 1454 | const gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
| 1455 | |
| 1456 | return rlc_data->spb_status.block_status_dl; |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * This function returns the spb value to be sent OTA |
| 1461 | * for RLC/MAC block. |
| 1462 | */ |
| 1463 | enum egprs_rlcmac_dl_spb gprs_rlcmac_dl_tbf::get_egprs_dl_spb(const int bsn) |
| 1464 | { |
| 1465 | struct gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1466 | egprs_rlc_dl_reseg_bsn_state block_status_dl = rlc_data->spb_status.block_status_dl; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1467 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1468 | enum CodingScheme cs_init = rlc_data->cs_init; |
| 1469 | enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1470 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1471 | enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); |
| 1472 | enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1473 | |
| 1474 | /* Table 10.4.8b.1 of 44.060 */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1475 | if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { |
| 1476 | /* |
| 1477 | * if we are sending the second segment the spb should be 3 |
| 1478 | * otherwise it should be 2 |
| 1479 | */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1480 | if (block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 1481 | /* statistics */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1482 | bts_do_rate_ctr_inc(bts, CTR_SPB_DL_SECOND_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1483 | return EGPRS_RLCMAC_DL_SEC_SEG; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1484 | } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || |
| 1485 | (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1486 | bts_do_rate_ctr_inc(bts, CTR_SPB_DL_FIRST_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1487 | return EGPRS_RLCMAC_DL_FIRST_SEG; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1488 | } else if ((cs_init == MCS4) && |
| 1489 | (cs_current_trans == MCS1)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1490 | bts_do_rate_ctr_inc(bts, CTR_SPB_DL_FIRST_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1491 | return EGPRS_RLCMAC_DL_FIRST_SEG; |
| 1492 | } |
| 1493 | } |
| 1494 | /* Non SPB cases 0 is reurned */ |
| 1495 | return EGPRS_RLCMAC_DL_NO_RETX; |
| 1496 | } |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1497 | |
Max | 9d7357e | 2017-12-14 15:02:33 +0100 | [diff] [blame] | 1498 | void gprs_rlcmac_dl_tbf::set_window_size() |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1499 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1500 | const struct gprs_rlcmac_bts *b = bts; |
Max | 34513fe | 2018-12-11 16:47:30 +0100 | [diff] [blame] | 1501 | uint16_t ws = egprs_window_size(b, dl_slots()); |
| 1502 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1503 | LOGPTBFDL(this, LOGL_INFO, "setting EGPRS DL window size to %u, base(%u) slots(%u) ws_pdch(%u)\n", |
Pau Espin Pedrol | 519d071 | 2021-01-14 14:30:03 +0100 | [diff] [blame] | 1504 | ws, bts->pcu->vty.ws_base, pcu_bitcount(dl_slots()), bts->pcu->vty.ws_pdch); |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1505 | m_window.set_ws(ws); |
| 1506 | } |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1507 | |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1508 | void gprs_rlcmac_dl_tbf::update_coding_scheme_counter_dl(enum CodingScheme cs) |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1509 | { |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1510 | switch (cs) { |
| 1511 | case CS1: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1512 | bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS1); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1513 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS1)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1514 | break; |
| 1515 | case CS2: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1516 | bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS2); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1517 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS2)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1518 | break; |
| 1519 | case CS3: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1520 | bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS3); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1521 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS3)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1522 | break; |
| 1523 | case CS4: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1524 | bts_do_rate_ctr_inc(bts, CTR_GPRS_DL_CS4); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1525 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_gprs_ctrs, TBF_CTR_GPRS_DL_CS4)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1526 | break; |
| 1527 | case MCS1: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1528 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS1); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1529 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS1)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1530 | break; |
| 1531 | case MCS2: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1532 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS2); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1533 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS2)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1534 | break; |
| 1535 | case MCS3: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1536 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS3); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1537 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS3)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1538 | break; |
| 1539 | case MCS4: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1540 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS4); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1541 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS4)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1542 | break; |
| 1543 | case MCS5: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1544 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS5); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1545 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS5)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1546 | break; |
| 1547 | case MCS6: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1548 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS6); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1549 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS6)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1550 | break; |
| 1551 | case MCS7: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1552 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS7); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1553 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS7)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1554 | break; |
| 1555 | case MCS8: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1556 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS8); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1557 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS8)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1558 | break; |
| 1559 | case MCS9: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1560 | bts_do_rate_ctr_inc(bts, CTR_EGPRS_DL_MCS9); |
Pau Espin Pedrol | 9c1db17 | 2021-06-04 17:05:51 +0200 | [diff] [blame] | 1561 | rate_ctr_inc(rate_ctr_group_get_ctr(m_dl_egprs_ctrs, TBF_CTR_EGPRS_DL_MCS9)); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1562 | break; |
| 1563 | default: |
| 1564 | LOGPTBFDL(this, LOGL_ERROR, "attempting to update rate counters for unsupported (M)CS %s\n", |
| 1565 | mcs_name(cs)); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1566 | } |
| 1567 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1568 | |
| 1569 | struct gprs_rlcmac_dl_tbf *as_dl_tbf(struct gprs_rlcmac_tbf *tbf) |
| 1570 | { |
| 1571 | if (tbf && tbf->direction == GPRS_RLCMAC_DL_TBF) |
| 1572 | return static_cast<gprs_rlcmac_dl_tbf *>(tbf); |
| 1573 | else |
| 1574 | return NULL; |
| 1575 | } |